Door lock



July 15,1930. J. w. HALL v 1,770,751

DOORLOGK FnedJan. 18, 1929 Vso Patented Juiyis, 1.930v

UNYITE ,STATES Josnrn W.. HALL, or inirvnn,` coLonAno nooit Loox` Application sied January 18,1929. serial No1 '$33,345.

-10 that the saine had been inadvertently left nii.-

locked.

Further, to provide a springfactuatedlock Y or vbolt of this characterY whichV is concealed within the door frame and is normally held in 15 aninoperative position, access to the said lock or bolt being had by the removal of a suitable covering place, whereby the bolt may rbe released to automatically lock ythedoor rwhen thesaid door is closed, as will be herein- 20 after fully set forth. Y f Y f Y Theseand other objects are accomplished by the device illustrated in the accompanying drawings in-which A Figui isa front viewl of a portion of 25 door Vframe and casing, illustrating the.; arf` rangement of the improved lock or boltv and the covering plate which normally closes-access to the bolt, the bolt being shown indotted lines.

of a doorfraine showing theshell or tube which incloses thebolt, and the spring actuated bolttlierein, which is normally-held in retracted or inoperative position, the tube bel `ing partly in section. A y Fig. 3 is a sectional View similar to Figure 2 showing the bolt thrown 'to'locking'position Fig. 4 is a sectional view on the line 4 4 clamped against movement by lock nuts, `to prevent unauthorized movement ofthe same from the outside of the door. Y vFig. 5 is a side view ofthe bolt, the vrear lend portion of which is in section. f p l `Fig. 6 is an edge View of thedoor, showing the manner of securing the shell or tube therein, and

n Fig. 'Tjis a side view of a portion ofthe shell Y or tube, looking ,at the o shown in Figures 2 and g .1 fr

lReferringtothe accompanying drawings,

F ig. 2 is a sectional View througha portion of Fig. 1, the pin by which the bolt is-detached from its retammg notch bemg bemg Shown Vitsleiids with undercut notches 8A and 9A corpposite sidefrom that the, letter A designates a portionl of Aa door frame, and Bthejamb or sidememberof the door casing. ,Intolthe edge of the door, and

AiiiFN'rfrorricg i preferably `above theusual lock 'is bored a f A horizontally .disposed-hole l, .which is preferably three and onehalfinches deep and about ninesinteenthsiof airincli in. diameter, and

a hole 1A' preferably about one inch in diameter, is bored' entirely through the door, so Vas 'tointersect'thej holelat a 'point about one ythird of the `length of the hole l fromits inf ner end. Into the hole 1,;.s nsertedfa tube or shell `2 which is closed at its inner 'endand has a narrow lange on its Vouter end which fitsfin afcorresponding recess'in the edge of thedoor so'as to lie Hush with the said edge, Y i the flange including apertured ears l for retaining screws 5 which are screwed into thej 4,edge ofthe door, thus securingthe shell 2 within thedoor and so as to prevent-a turning -movementof the same. frOpposite longtudi nal/slotsjandfru are cutthrough the wall of the shelhand tliesegslots are approX-iinately.I

one fourth ofY the length of theshell, and about lone eighth of an yinch wide, and the inner ends of these slots terminate at about'the center of the length of the yshell. The slot 6 liesnext to the inner 'side of the 'door,and the lower edge of this slot has notches 8 and 9 cut inits opposite ends` the inner edges of which arev undercut, as clearly shown in Fig.- ures2 and 3. AThe upper edge of thisslotis also provided with a notch l0, centrallyl of its length, and the edge of this `notch lnearest kthe openend of the shell isy undercut, as shown. r l Y. r i `'lheupper edge of the slot 7 is provided at respondingto the nctcliesS and 9 in the lower edgeof the slot. and the under edge of the said slot 7 is provided withV a notch 10A corresponding to the notch l0 in the upper edge of the slot 6, as clearly shown in Fig. 7.

Within the shell 2 is inserted a loclr Vbolt l1 which `is somewhat shorter than IVthe shell. The outer end -ofvA this bolt terminatesV ina blunt conical point l2 while its inner end is recessed as shown at 13, `and a. hole 14 is drilled through the bolt near its rear end. A coil sprino' 15 is interposed between the inner en d of the bolt and the innerfend ofthe shell, and one end of this spring enters the recess 13 in the end of the bolt and is engaged by a lugor pin 16 in the wall of the" recess, while the opposite end of the said spring bears against the end of the shell and is engaged byV a. pin 17 in the said end. Thepbolt is then given a number of right hand turns, by 'any suitable ineans, and as the ends of the springl are engaged by the lugs or pins loand 17 respectively, the spring will thereby be wound or twisted upon itself sonas to be under torsional tension. lVhile the spring is under this tension, the bolt 2 isy pushed into the shell until the hole 14 `in the bolt registers with the notches S and 8A. inthe edges of the slots 6 vand 7 of the shell, and the spring is thereby coinpressed. A pin 18 is then passed info aie haie 1A and driven through are hole.

111 in the bolt indie of afl'eng-th to extend a short distance beyond eachslde of the bolt.

i When the twisting action on the bolt is released,` the torsional force Vof the springl will vturn the bolt'i'n the opposite direction whereby one end of the 18 will "engage the notch 8 and vthe other end thereof will engage the 'notchSA and the undercut edges ofthese'notches will engage the pin cand 'thus Ihold the bolt in ai retracted or inoperative position, as will-'be understood, the spring 1:5 being under both torsional and. eXpansi'on 'f tension. 'After securing `the bolt '11 within the shell, Ainthe manner above described,- the opposite 'ends of the hole I'Aare closed by vlne-'tal disks or plates C and ID which are s'ecured to the "door by 'screws as shown. The torsional force 'of the spring 15 will hold the pin 18 in engage'inent with the lnotches A8 and 8A thus preventing the bolt from being accidentally or unintentionally thrown or "shut to locking position. n Y

The i'niproved'llocking bolt is in addition to the regular locking vineans iwith which the door is suppliecha'nd is neve'r used excepting in caseswhere the door has been inadvertentlv left unlocked v'at the close of 'the day, and Ithenl it is utilized as. will presently be e'X- plainedf, y

It is the duty of police officers, private detectives or night watchnien to try all doors in business districts, as they go their rounds, ii'ndif'a door is yfound unlocked, fthe person concerned 'is'iiotilieth inorderthatzhe ia'y" ap'- 'pe'ar and loclr the said door. AlVith the em 'ploynient of the improved lock, however, the ve ber may lock the fdecrwitheut ui@ 2neces.- sity of calling up the person concerned, and this ispaccoinp'lished in the 'following'vmanner If thedoor is foiind'to be unlocked, the ofiicer enters the store 'or ndice, as the case may be, 'and ieinove's one o f'the screws frorn the plate f C on they inside of the door, which perinits the plate to swing around vand uncoverl the hole 1A which aordsaccess to the pin 18 which holds the bolt in retracted position.

I-Ie then lifts the pin 18 out of the notch 8 and permits the bolt to be moved forward by `the spring 15 until thepin registers with the Vnotch 10; he then presses thepin up into the Figure 2. The otlicer then steps outside and closes th'edoer and as the door closes, the conical end of the boltfengages the usual keeper K on the stile B; and the bolt will be 'pushed vback far enough to perinit the pin to p'a'ssout of the notch '10,but not far enought'o permit the pin-to enterthe notches -8 and 8A, as the'baclrward movement of the boltis less than' the distance between'the notch 10 and the notches 8 and 8A; `andwhen the end of the boltfreg'isters with the usual opening in the keeper K the bolt will be thrown `by the spring 1'5 until the ypin engages the ends of the slots Gland 7, when the torsionalforce 'of thespring will turn the bolt so that the pin will enter the notches 9 and 9A and thus hold the boltv in locked position.

When the proprietor of theistore or ofiice arrives in the Inorning,whe nds that he had left thel door unlocked the night before, but that the door has been fastened by the special lock. IIetherefore'freincwes one of the screws from the outside Yplate D and turns thesaine to uncover the hole 1A; he then pushes the .pin 18 down, which turns the bolt andreleases thepinifrointhe'notches 9 and k9A,an`d then@pushesfthe 'bolt lback until the pin engagesth'e inneri'endsof'the slots 6 and 7 when the torsional-force lof the spring will turn the bolt and cause the pin to engage the notches S and 8A, and the bolt will then be held in its retracted or inoperative'position.

In Figure Il the pin 18 is threaded and a nut 2O is screwed upon its inner end and against the 4shell 2, and a lock nut 21 is screwed against the nut 20. By this means the pin l18 is 'held against movement-and the LIW) bolt is thus preventedfrom being locked by e la person 'on the outside desiring to play a practical joke.vv

1. In a lock of the character described, the

vcombination with a door having a hole extending into it from its outer edge, and a second holewhich intersects the first hole and yextends entirely through the door; of a tubulars'hell secured in the first hole having longitudinal slots which register with the said 'second'hole the edges of 'which'are notched at their opposite ends; a boltin said and shell, said spring being nnderftorsionalV A shell having a pin extending therethrough 'tension to hold ysaid p inan said rear notches,

and through' said slots and'` intothesecond and means for locking said pin in saidnotches.A hole, and in normal engagement with the4 notches atthe rear ends of the slots'thereby tohold theboltv in retracted positionfanorc mally compressed coilspring between therear Y provided with opposite longitudinal slots the edges of which are notched at their opposite ends and centrally of'their lengths, the end endofthe boltandthe adjacent `end of the shell and connectedto thebolt and shell, said spring being under torsional tension `thereby to hold said pin in said n`otches,said` pin being adapted to be manually tripped to release the vbolt to permit the same to be thrown to locking position, the torsional Aforce offsaid Y i j spring .causing said pin to enter the'notchesv at the front ends of the slots, whereby the vbolt is locked against accidental backward movement,and plates for normallycoveri'ng lthe ends of thesecond hole. l f 1 Y 2. In alock of the character described, the

combination withadoor and jamb, saidjamb having a keeper; said door havinga holefeX- Vtendinginto the same from its front edge i and a second hole which intersects` the firstv hole and extends thru the door; of a tubular ofsaidslots being notched at their, endsV and midway of their lengths; a bolt in the shell having a pin extending therethroughfand `through said slots and V.into said second hole f and in normal engagement with the notches In testimony whereof,IatiiX my signature.

Y shell in the first hole having longitudinal slots'V Y `which register with the second hole, the edges to bolt and shell, said spring being yunder tor'- Y sional tension to hold said pin insaid notches,`

said pin being adapted to be manuallydiscon nected from the rear notches andsecured in the middle notches and held therein against the torsional force ofthespringwhereby when the door is partiallyclosed the bolt is released from said notchesby the initial en#- gagement of the projecting end of the bolt with the keeper, and thrown to locking engagement with the said keeper whenthey door .is fully closed; and platesit'or normally clos- 1 notches being in the lower edge of one slot and in the upper edge of the other'slot, the i in normal engagement with the rear end` notches, a normally compressed spring be? A 

